Press



C. H. PEIRSON AND C. H. BUTLER.

PRESS.

APPLICATION FILED DEC. 13. 1919.

Patented Sept. 14, 1920.

4 SHEETS-SHEET l- C. H. PEIRSON AND C. H. BUTLER. PRESS.

APPLICATION FILED DEC. 13. 1919.

4 SHEETS-SHEET Patented Sept. 14,1920.

C. H. PEIRSON AND C. H. BUTLER.

PRESS.

APPLICATION FILFD DEC. 13. I9I9.

1 3 5 2, 987 Patented Sept. 14, 1920.

4 SHEETS-SHEET 3. 5

C. H. FEIRSON AND' C. H. BUTLER.

PRESS.

APPLICATION-FILED DEC. I3, 1919.

Patented Sept. 14, 1920.

4 SHEETS'SHEET 4- Iwenfcma lzarl'ca HPezlr5 7L harles H 15111761.

iesaosr,

warren STATES r Tsar OFFICE.

CHARLES H. rnmseiv, or GLENSIDE, nn oneness rr. stringer PnrLADEtP'nIA, PENNSYLVANIA, ASSIGNORS TO E. r. noue qroiv & 00., or r-n LADE-Lrrrra, PENN-Y SYLVANIA, A CORPORATION OF Pnr iisYLvA rA. a I

PRESS.

Specification of Letters Patent. Patented Sept. 14, 1920.

Ap l n 5 1 6 e mb is a sea n- $4 1 606- To all LU/t), it may concern:

Be it known that we, Gra ams PrimsoN and Crni z ins H. BUTLER, citizens of the United States, residing in Glenside, Mont. Co, Pennsylvania, and Philadelphia, Pennsylvania, respectively, have invented certain Improvements in Presses, of whichthe following is a specification. This invention relates to machines for forming shaped leather washers, packings, and similar articles, and the object of the invention is to provide an improved method and machine whereby the manufacture of the said articlm is simplified and the output materially increased while involving less labor.

In the attached drawings:

Figure 1 is a front elevation of the ma chine;

Fig. 2 is a side elevation of the machine;

Figs. 3, 4L, andfi, are horizontal sections taken on the lines a-e-a, b? and 0-0, re spectively, in Fig. l;

Fig. 6 is a vertical section of the upper portion of the machine, taken on line d d, F an Fig. 7 is a vertical section. of the lower portion of the machine, taken on the line @"f,

tVith reference to the drawings, the machine consists of a hydraulic press comprising a pedestal 1, to which is attached a main frame consisting of a lower frame 2, and an upper frame 3, said upper frame being joined to said lower frame by means of upright'bolts 4-, two upon each side of the press. A vertical cylinder is formed in the main frame 2, and a pipe 6 connects said cylinder with a suitable source of hydraulic power. Located within the cylinder is a ram 7, said ram being attached to a movable platen, 8, which travels between and is guided by said bolts 4:, the upward motion being obtained by hydraulic pressure within the cylinder 5, operating against the ram 7, and the downward motion being caused by gravity, Upright bolts 9, one at each side, extend upwardly from said movable platen, S, and an upper movable platen or carriage, 10, located above the upper frame 3, is mounted upon said bolts 9, and is adapted to slide thereon, the travel of said upper platen relative to said bolts 9,

ng im ed y th nu 11 upo h pper extremity thereof and the collars 12 attached in suitable manner to said bolts!) intermediate the ends above the upper platen 8, is

thereof, Extending inder member 13, having located therein an upper ram .14, said ram being extended and the lower portion thereof passing downwardly through a central opening 15 formed a hollow cyl- I in the upper platen 10 and into a well, 16,

fo l-med in the upper frameB, to which it is secured in any suitablemann er, in the pres ent instance by a set screw,- 17. A pipe 18 establishes connection between the cylinder "13 and a suitable source of hydraulic power.

The operation of the machine in so far as described, is similar to that of any hydraulic press of this type. i be applied to the ram 7, within the cylinder 5 to'raise the platen 8. and force it against Hydraulic pressure may the bottom of the upper frame 3, whilepressure applied to the ram 14E within the cylinder 13 will force the upper platen 10 and the lug 19 by means of a handle 21, thereby giving free access over the entire surface of sald bed plate and consequently to anything thereon. Borne upon the said bed-plate, and

properly positioned thereon by means of pins 22, which extend into holes 23in the bed plate, is a set of male dies, 24, 25 and 26-the bed plate in the present case being adapted to take three of said dies, the larger one24 of which only is shown upon the bed plate, these dies being held concentrically positioned and spaced upon the plate by means of the said pins 22, three of which are carried by each die, the said pins fitting into holes 23 made to correspond therewith in the bed plate.

Secured to the nether surface, of the upper frame by means of bolts 27, or in any manner which may he found suitable, are

a set of female dies corresponding in numher and size with the male dies upon the bed plate 20, and disposed directly opposite thereto, saidset of female dies consistof three dies, 28,

ing injthe present instance the male dies 24,

29 and 30 corresponding to 25 and 26 respectively, the male dies'25 and v 26 being shown depending from the femaledies 29 and 30 in which they are retained by friction due to the-leather washer com? pressed between the male and female dies as will later be more fully explained.

Located within each of the female dies is an ejector ring, 31, 32 and 33, respectively, and secured to each of said ejector rings are four vertical ejector pins 31, 32 and 33 male dies to retain the rings within their 4 respective annular spaces.

The upper platen or carriage 10 comprises a body 38, a camplate 39 and four sets of guides 40 which are secured to the under side of the said body and whichsupport the cam plate 39 within the body 38. The body 38 has secured to each side there of a lug 41 through which pass the bolts 9,

whereby connection is made between the said upper and lower platens. The cam plate 39 is free to rotate around its axis and a handle 42, secured to the said plate and extending outwardly over the edge of the frame, furnishes a means whereby the cam plate maybe thus turned. Supported in the slots between each of the sets of guides 40 and adapted to travel back and forth therein is an ejector pin 43, said pins hav- 111g in the present instance recesses 44 formed'in the sides thereof into which the sides of the guides. extend, thereby supporting the said pins while permitting movement along the guides. Secured upon the top of each of the pins 43 by means of screws 45 is a roller 46, each of saidrollers extending upwardly into one of the four cam obliquely disposed slots 47 in the cam plate 391 It will now be seen that as the cam plate is turned by means of the handle 42, the ejectorpins 43 will be forced in or out, as the case may be, between their respective guides 40, this movement being efiected by the action of the cam slots 47 upon the roller 46.

In forming the leather washers by means of the machine described a leather blank in the form of a band or belt is employed, instead of the usual disk shaped blank. These blanks are firstplaced around the outside of the male dies in a vertical position and the upper half thereof which extends above wardly the upper edge of the die is then pushed in in Fig. 1, which shows the leather ,bla 1 k ;48 extending around the male die 24,.the upper portion of the blank 48 extending above the upper edge of the said die and being bent inwardly over the top edge of the die, said blank 48, being shown in broken lines. In this condition the leather blank and the male die are in readiness to be forced into the female die attached to the upper frame for forming the shaped washer, the finished washer being in the present case of U-shaped cross section, or what is commonly known as a U leather.

The lower platen is now carried upward by hydraulic pressure acting upon the ram 7, and'the male die carrying the leather blank enters the corresponding female die upon the upper frame and is forcedto the entire depth of said female die, the ejector ring located within said female die together with the pins attached thereto being forced upwardly. The final position assumed by the various elements of the dies is shown in Fig. 6, in which the two smaller male dies 25 and 26 together with the leather blanks are established within the female dies 29 and 30,and also here illustrated is the fact that after the lower platen is lowered away from the upper frame the male dies 25 and 26 remain dependent from the female dies, being held by the pressure created by the compressed leather. 7

It thus becomes necessary, when the leather has remained a sufficient length of time, under compression, to remove the same together with themale' die from the female by force, and this is accomplished'by means of the upper platen 10 and the ejector pins over the top of the die illustratedcarried thereby. This upper platen 10 is carried upward as the lowerplaten rises by means of the collars 12 upon the bolts 9, the collars abutting the lugs 41 and'being so located upon the said bolts that when the lower platen is at the extreme upper position the lower ends of the ejector pins 43 just clear the top of the pins 31, 32 and 33*, V 7

carried by the ejector rings 31, 32' and 33. p

In this position of the upper platen theejector pins 43 may be moved to a position directly over any one of the sets of pins 31", 32 or 33*, and as the pressure in the cylinders 5 is relieved and the lower platen starts to move downwardly, pressure is, applied in the cylinder 13 whereby the upper platen is forced downward, and the pins 43 impinging upon the pins 31 32 and 33 as the case may be, the ejector ring within the female die is,

forced downward, with the consequent ej'ec tion of the 'now shaped leather and the male die; It is apparent that the ejection of the male die and the beginning of the downward motion of the lower platen are simultaneous, and as the male die with the shaped leather the bed plate 20, whereby the dies are held thereon leaves the female die, the pins 22 still extend into their respective holes 23 in properly positioned thereon. I

TWfth a machine of this type employing several sets of dies, a continuous action is possible. As a blank is forced into one of the female dies, the finished leather in the adjacent die is removed. In other words, each reciprocation of the lower platen drives a new blank into one of the female dies and removes a shaped leather from one of the others, each leather remaining under compression the length of time required to remove the leathers from the other dies and replace them by new ones, or in the present instance, during two complete reciprocations of the platens.

Referring to Figs. 6 and 7 and considering them together as parts of an assembled machine, the male die 24: together with a shaped leather 50 has just been ejected from the female die, 28, the male dies 25 and 26 being shown depending from the female dies 29 and 30, in which leathers, 51 and 52, are under compression between the two (male and female) dies. The next step in the op eration is to remove the finished leather 50 from the die 24 and replace it by a new blank, after which the die and blank are forced up into the female die. While the platens are in the elevated position the pins 43 are moved inwardly in the manner already described so that as the platens return to normal low position, the male die 25, carrying its shaped leather 51, is ejected from the female die 29. The leather 51 is now replaced by a new blank, which is then forced into the female die 29, after which the male die 26 and the shaped leather 52 are forced from the female die 30, a new blank forced into this female die 30, the now shaped leather in the female die 28 ejected and the cycle repeated.

The operation of the machine is continuous and cyclical so that the waste of time contingent upon the former method of single shaping is avoided, there being no delay while waiting for the leathers to set. This machine and the use therewith of belt shaped rather than disk shaped blanks materially decreases the time consumed in forming these shaped leathers and simplifies the process to a great degree, the result being that the cost involved in the manufacture of the article is greatly reduced. The machine may be modified in many respects in so far as the details thereof are concerned with no departure from the essential features of the invention, and although this machine has a particular application to the shaping of leather articles it is clear that its use may extend to articles of other material as well.

Having now fully described our invention and having made clear the operation of the machine and the various steps involved in the method of formingshaped leathers and the like, weclaim: V i

1, In a press, a set of fixed dies anda corresponding set of movable dies, means for carrying Said movable dies forward to ward their corresponding fixeddies for compressing article therebetween, and backward In a press, a stationary frame, a set of fixed dies secured to said frame, a movable platen, a set of movable and independent dies corresponding to said fixed dies carried by but not secured to said platen, said platen being adapted to reciprocate to carry. said movable dies to and from their respective companion fixed dies, means operably con nected with said platen for forcing said movable dies toward the fixed dies to compress articles therebetween, said movable dies being frictionally retained with the work between themselves and the fixed dies, and means operating in conjunction with the movable platen for releasing one of said retained dies together with the compressed article simultaneously with each backward movement of said platen.

3. In a press, a fixed frame and a platen adapted to travel therein, a set of female dies secured to said frame and a correspond ing set of male dies carried by but not secured to said platen, said platen being adapted to reciprocate to carry said movable dies to and from their respective companion fixed dies, means connected with said platen-for forcing said male dies and. articles to be compressed into their respective female dies, said male dies being frictionally retained in said female dies while said articles are under compression, an ejector carried by each of said female dies, said ejector comprising a movable ring located in the interior of said dies, pins attached to said rings and extending through apertures in the baseof said dies, and actuating means for said ejectors comprising a series of re ciprocating selector pins adapted to engage the ejector pins of said female dies, means for adjusting said selector pins to engage the ejector pins of anyone die desired, and means for advancing said selector pins to engage said ejector pins simultaneously with each backward movement of said platen.

4:. In a press, a fixed frame and a platen adapted to travel therein, a set of male dies carried by but not secured to said platen, and a set of female dies corresponding with said male dies secured to said frame, means for moving the platen toward the said fe-- male dies for forcing the male dies and articles to be compressed into their respective female dies, said platen being returned by gravity to its original position, and said male dies being frictionally retained in their respective female dies While an article is under compression therebetween, ejectors carried by each of the female dies for discharging said retained male dies therefrom'together with the compressed articles, and means con nected with said platen'for actuating said ejectors, said actuating means comprising a carriage, pins carried thereby, means for ad justing said pins for engaging the ejector in any one of said dies, and meansfor moving said carriage to bring said engaging pins into operation simultaneously with each return movement of the platen.

5. In apress, a fixed frame and a platen adapted to travel therein, a set of female dies secured to said frame, and a corresponding set of male dies carried by but not secured to said platen, said platen being adapted to reciprocate for moving said male dies pression therebetween, an ejector carried,

by each of-said female dies for releasing said retained male dies and compressed articles, means for actuating said ejectors, said actuating means comprising a carriage, radial slots carried thereby, pins mounted and adapted to travel in said slots for engaging= said ejectors, a cam plate containing a cam slot for each of said pins, said pins each having an extension projecting' into its respective cam slot, meansfor rotating said cam plate for disposing the pins in their slots to engage any one of said ej ectors, and

means for movingsaicl carriage to'bring said pins into engagement with a chosen e ector simultaneously with each backward movement of sald platen.

cHARLEs H. PEIRSON. CHARLES H. BUTLER. 

